moyee



(No Model.)

. C. P. MOYBR.

VENTILATING DOOR PORJMINBS. No..286.549. Patented Olot. 9, N83..

W1 TNESSES.- [Agg/WUR TTORNEY UNrrED STATES PATENT OFFICE.

cAsrnn r. Morne, or Woonvnmn, VrnNNsriNAN1A.

VENTlLATlNCf-DOOR FOR lVilNES.

SPECIFICATION forming part of Letters Patent No. 286,549, dated October 9, 1883.

Application filed May 2S, 1853.

(Nomodel.)

Woodville, in the county of Allegheny, State of Pennsylvania, have invented a new and useful Improvement in Ventilating-Doors for Mines; and I do hereby declare that the fol- Vlowing is a full and exact description thereof, reference being had to the accompanying' drawings, and to the letters of reference marked thereon.

In vmining coal and other minerals, in order to secure a proper division of air through the several entries of the mine, it has been found necessary to place in the different entries a door or gate, which is usually opened and closed by a boy, and in large mines it requires a number of said doors or gates, and a 1 corresponding number of boys, who are often negligent in the performance of their duty, and in descending grades in the mines the train of tram-cars, With their mule or mules, are often forced up against the door or gate, or brought up in such close proximity that it is impossible to open the door until the entire train of cars is forced or drawn back. This causes a loss of time, much trouble and annoyance, and not unfrequently results in dangerous accidents to driver and mules. Now, the object of my invention is the controlling of the opening and closing of' said doors or gates by means of cords, pulleys, and

levers, combined With said doors or gates,

4 of, and D the tramway. In the entry A are arrangedside posts, E F. To the .post F, at G, is hinged a door, H, having latch, I, to which is attached a cord, J, connected to thelower horizontal limb of an L-shaped lever, K, pivoted at c, in a block, b, ou the door H. To the vertical limb of said lever is attached a cord, L, which passes over pulleys m iz, attached to the side Wall C of the entry A. On the end of said cord is a handle, o. To the cord L is attached a cord, M, which passes over a pulley, P, and through an opening, g, in the post F, 4and over pulleys arranged on the side Wall C, on the opposite side vof the door H, similar to j panyirig drawing.

the pulleys nl and a, andfurnished with a handle similar to the handle o. At the top of the gate H is secured a block, c, yin which, at d, is pivoted an L-shaped lever, e, to the horizontallimb of which is attached a cord, f. connected to the latch I, and to the vertical limb of said lever is attached a cord, g, which passes over a pulley, h, and through an opening, i, in the side post E, and from thence along the side Wall B over a pulley, j, the end of said cord being furnished with a handle, la.

To the cord g is also attached a cord, Z, which passes over a pulley, r, on the side wall B. On the end of said cord is a handle, s, the said pulleys r and I1. being on the opposite side of the door H, and at suitable distance therefrom.

The skillful mechanic, miner, or mining engineer, will readily understand the construction of my improvement from the foregoing description, and by reference to the accom- I will therefore proceed to describe its operation, which is as follows: The driver passing through the entry, when lie comes within reach of the handle o of the cord I, or the handle of the cord M, pulls on said cord, which will draw on the lever K, which will cause the cord J to raise the latch I and dranT the door H back against the 4side Wall C, until the latch I catches in the hook t,

secured in the side wall G, for the purpose of f pulls upon the handle k, which draws the cord 0, which will in like manner close the door H.

Having thus described my improvement, what I claim is In combination with the door H, levers Kc,

cords L, M, J, f, y, and Z, connected to said door' and its latch, and operating substantially in the manner and for the purpose specifred. l

G. l?. MOYER.

' Witnesses: A. C. Jeansron,

L. M. Sensoren.

IOC 

